I'm on a hotel Wi-Fi network where occasionally the following message shows up in Chrome when trying to visit any Google sites over HTTPS:

The SSL certificate reported when this happens is

This error doesn't happen all the time, but still pops up regularly. It only happens for Google websites; all other websites work over SSL, and all non-SSL websites work as well.

What could be causing it? If it's a misconfiguration of the proxy server or router connecting the network to the internet, why does it only happen for Google, and why is a Netflix certificate showing up?